大型钢网架整体顶升安装技术研究

Study on Integral Jacking Installation Technology of Large Steel Grid Structure

造型简单外观规则的网架结构适合采用整体顶升技术安装,但顶升工况下网架的受力与使用工况有较大区别,顶升点的布置位置对网架顶升工况下的受力影响较大,因此网架顶升前有必要对顶升工况下的整体受力和变形进行验算,并作出针对性的深化设计和加固。基于一个工业厂房钢网架屋盖的顶升作业,研究了顶升点位置对网架顶升工况下受力的影响,针对顶升工况提出了优化设计思路,并总结了大型钢网架整体顶升施工技术,为类似工程提供了参考。

Grid structures with simple shapes and regular appearances is suitable for the installation of integral jacking technology,but the stress on the grid under the jacking condition is quite different from that under the service condition,and the layout of the jacking point has a greater impact on the stress of the grid under the jacking condition,thus it is necessary to check the overall stress and deformation of the grid before jacking,and make targeted deepening design and reinforcement.Based on the jacking operation of the steel grid roof of an industrial plant,the paper investigates the influence of the jacking point position on the stress of the grid jacking working condition,points out the optimized design ideas under the jacking working condition,and sums up the integral jacking construction technique for the large-scale steel grid,to provide some reference for similar projects.